added negativ tests for user extensions
deleted some negativ tetst which are allways positiv and should not be testet as negativ
[fix] pagination starts with 1 not 0
[fix] fixed search regression test
Merge branch 'davidmoebius-OSNG-238' into OSNG-251

Conflicts:
	src/test/groovy/org/osiam/client/ScimExtensionNegativIT.groovy
	src/test/groovy/org/osiam/test/server/ControllerIT.groovy
[cleanup] renamed test
[fix] added database seeds to methods